Can I add kern/28582 to the list?

Basically on machines that don't have PS/2 ports, you can't debug  
without disabling pckbc and pckbd in userconf, or building your own  
kernel with them removed because pckbd always attaches as console  
even when there are no physical PS/2 ports due to legacy emulation  
which cannot be turned off.

But, building a kernel without pckbd/pckbc means you can't use the  
BIOS emulation to debug post boot before the USB controllers get set  
up, before ukbd gets attached, or get to userconf.